Remove CRWNetworkActivityIndicatorManager.

ios/web/crw_network_activity_indicator_manager.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef IOS_WEB_CRW_NETWORK_ACTIVITY_INDICATOR_MANAGER_H_
-#define IOS_WEB_CRW_NETWORK_ACTIVITY_INDICATOR_MANAGER_H_
-
-#import <Foundation/Foundation.h>
-
-// This class controls access to the network activity indicator across the
-// app. It provides a simple interface for clients to indicate they are
-// starting a network task and they would like the indicator shown, and to
-// indicate they have finished a network task.
-//
-// Clients are required to pass an NSString* to each method to identify
-// themselves. Separating clients into groups prevents a client from "stopping"
-// requests from other clients on accident, and makes those bugs easier to
-// track down. Specifically, the manager will immediately fail if the number
-// of tasks stopped for a group ever exceeds the number of tasks started for
-// that group. Clients are responsible for namespacing their group strings
-// properly. All methods must be called on the UI thread.
-@interface CRWNetworkActivityIndicatorManager : NSObject
-
-// Returns the singleton CRWNetworkActivityIndicatorManager.
-+ (CRWNetworkActivityIndicatorManager*)sharedInstance;
-
-// Begins a single network task. The network activity indicator is guaranteed
-// to be shown after this finishes (if it isn't already). |group| must be
-// non-nil.
-- (void)startNetworkTaskForGroup:(NSString*)group;
-
-// Stops a single network task. The network activity indicator may or may not
-// stop being shown once this finishes, depending on whether there are other
-// unstopped tasks or not. |group| must be non-nil, and have at least one
-// unstopped task.
-- (void)stopNetworkTaskForGroup:(NSString*)group;
-
-// A convenience method for starting multiple network tasks at once. |group|
-// must be non-nil. |numTasks| must be greater than 0.
-- (void)startNetworkTasks:(NSUInteger)numTasks forGroup:(NSString*)group;
-
-// A convenience method for stopping multiple network tasks at once. |group|
-// must be non-nil. |numTasks| must be greater than 0, and |numTasks| must be
-// less than or equal to the number of unstopped tasks in |group|.
-- (void)stopNetworkTasks:(NSUInteger)numTasks forGroup:(NSString*)group;
-
-// A convenience method for stopping all network tasks for a group. |group|
-// must be non-nil. Can be called on any group at any time, regardless of
-// whether the group has any unstopped network tasks or not. Returns the number
-// of tasks stopped by this call.
-- (NSUInteger)clearNetworkTasksForGroup:(NSString*)group;
-
-// Returns the number of unstopped network tasks for |group|. |group| must be
-// non-nil. Can be called on any group at any time, regardless of whether the
-// group has any unstopped network tasks or not.
-- (NSUInteger)numNetworkTasksForGroup:(NSString*)group;
-
-// Returns the total number of unstopped network tasks, across all groups. This
-// method was added for testing only. Clients should never depend on this, and
-// should instead only be concerned with the number of unstopped network tasks
-// for the groups they control, which can be queried using
-// |-numNetworkTasksForGroup:|.
-- (NSUInteger)numTotalNetworkTasks;
-
-@end
-
-#endif  // IOS_WEB_CRW_NETWORK_ACTIVITY_INDICATOR_MANAGER_H_